Tourism in Japan 1993 Japan National Tourist Organization
Tokyo, Kasumigasaki Chiyoda-ku J.N.T.O, 1993.,
 Buku Teks
Directory of university professors and researchers in Japan 1982: Engineering
Japan Society for the Promotion of Science, 1882
 Buku Referensi
Endang Indrati Sedijoprapto
Informasi taman nasional bagi peneliti = National park information for researchers
Program Pascasarjana Universitas Indonesia, 1990
 UI - Tesis (Membership)
Katalog induk nasional 1993 = national union catalog tahun 1993
Perpustakaan Nasional RI, 1994
 Buku Referensi
Ojima, Kikue
Handbooks on the National language readers of Japan
San ko sha, 1929
 Buku Teks